/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Operations/GroupTopologyDeformer.h
Save this vertex. Does not check that VertexID hasn't already been added.
void AddVertex ( const [FDynamicMesh3](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3) * Mesh, int VertexID )